Inflection Point - The New Era of Serial Attached SCSI
Page 2
...cables used on bus) Multitude of all devices connected to shared bus 320 MB/s (Ultra320 SCSI); performance degrades as more drives added Over 16,000 drives Compatible with all other drive...bus SAS Serial, point-to-point, discrete signal paths 3 Gb/s, roadmap to 12 Gb/s; Yet one aspect of its practical performance limits, serial interfaces ...cable length) to the present, where the technological landscape has been radically transformed. no ID number conflicts on Serial Attached SCSI (SAS) The SCSI Inflection Point Flash forward to circumvent SCSI's inherent limitations has wrought hard...
...cables used on bus) Multitude of all devices connected to shared bus 320 MB/s (Ultra320 SCSI); performance degrades as more drives added Over 16,000 drives Compatible with all other drive...bus SAS Serial, point-to-point, discrete signal paths 3 Gb/s, roadmap to 12 Gb/s; Yet one aspect of its practical performance limits, serial interfaces ...cable length) to the present, where the technological landscape has been radically transformed. no ID number conflicts on Serial Attached SCSI (SAS) The SCSI Inflection Point Flash forward to circumvent SCSI's inherent limitations has wrought hard...
Inflection Point - The New Era of Serial Attached SCSI
Page 3
...and greater expense. Seemingly innocuous added bulk, loss of the signal and reducing cable length, both radiates EMI and receives it radiates. SCSI Inflection Point: Standardizing on Thus all connected drives into nearby conductors, distorting the signals must compete for faster throughput, bit cell... lag between the first and last bit's arrival at the solution. A closer look at the signals on the SCSI cable Skew SCSI Cable Skew particularly susceptible to market demand Effective solutions include slowing the speed for bus access via a relatively they carry. Twisted...
...and greater expense. Seemingly innocuous added bulk, loss of the signal and reducing cable length, both radiates EMI and receives it radiates. SCSI Inflection Point: Standardizing on Thus all connected drives into nearby conductors, distorting the signals must compete for faster throughput, bit cell... lag between the first and last bit's arrival at the solution. A closer look at the signals on the SCSI cable Skew SCSI Cable Skew particularly susceptible to market demand Effective solutions include slowing the speed for bus access via a relatively they carry. Twisted...
Inflection Point - The New Era of Serial Attached SCSI
Page 4
...remaining SCSI address on a SCSI bus while maintaining adequate performance may employ marginal materials and/or construction techniques, with small form factor drives in bus speed). The roles of seven devices per device as more devices are highly susceptible to crosstalk (see Point-to recognize ...financial) headache of bus arbitration overhead. This came at the other light-duty storage has become common practice in desktop computers. Internal ribbon cables are added to the bus. SCSI ID numbers range from RFI) contributed to 12 meters. As such, the actual number of LVD ...
...remaining SCSI address on a SCSI bus while maintaining adequate performance may employ marginal materials and/or construction techniques, with small form factor drives in bus speed). The roles of seven devices per device as more devices are highly susceptible to crosstalk (see Point-to recognize ...financial) headache of bus arbitration overhead. This came at the other light-duty storage has become common practice in desktop computers. Internal ribbon cables are added to the bus. SCSI ID numbers range from RFI) contributed to 12 meters. As such, the actual number of LVD ...
Inflection Point - The New Era of Serial Attached SCSI
Page 5
... chain (irrespective of their needs. IT managers can contribute to achieving outstanding performance, scalability and flexibility. In addition, point-topoint cabling ensures there is far simpler and more cost- But SAS's point-to -point architecture pays numerous dividends. Its point-to 12... Gb/s) as well as vastly superior scalability. Point-to-Point Architecture The elegant simplicity of SAS and SATA drives to both single-ended signals Figure 2. Of course, serial data transfer means there are ...
... chain (irrespective of their needs. IT managers can contribute to achieving outstanding performance, scalability and flexibility. In addition, point-topoint cabling ensures there is far simpler and more cost- But SAS's point-to -point architecture pays numerous dividends. Its point-to 12... Gb/s) as well as vastly superior scalability. Point-to-Point Architecture The elegant simplicity of SAS and SATA drives to both single-ended signals Figure 2. Of course, serial data transfer means there are ...
Inflection Point - The New Era of Serial Attached SCSI
Page 6
... only four. The maximum length allowed is not additive of all connections, as a highly effective means to drive high-speed signals over long cables while minimizing vulnerability to environmental noise (for each dedicated connection between a pair of the 16 data paths)...ensuring uninterrupted data availability. Hot Pluggable/Hot Swappable SAS's hot plug capability enables drive swapping without performance degradation. Worldwide Unique Device ID Compatibility with SATA By ensuring Serial Attached SCSI cables/ connectors, backplanes, expanders and host bus adapters (HBAs) are use ,...
... only four. The maximum length allowed is not additive of all connections, as a highly effective means to drive high-speed signals over long cables while minimizing vulnerability to environmental noise (for each dedicated connection between a pair of the 16 data paths)...ensuring uninterrupted data availability. Hot Pluggable/Hot Swappable SAS's hot plug capability enables drive swapping without performance degradation. Worldwide Unique Device ID Compatibility with SATA By ensuring Serial Attached SCSI cables/ connectors, backplanes, expanders and host bus adapters (HBAs) are use ,...
Savvio 10K.3 SAS Product Manual
Page 10
... in this manual and the Seagate SAS Interface Manual, part number 100293071. The drives depend on the "TCG Storage Architecture Core Specification" and the "TCG Storage Workgroup Security Subsystem Class: Enterprise_A" specification with Seagate standards as noted in the ... Tables 2 and 3, DC power requirements. 2 Savvio 10K.3 SAS Product Manual, Rev. Shielded I /O cables are external to the enclosure, shielded cables should be securely mounted to guarantee the specified performance characteristics. In particular, the drives must be required if the enclosure does not provide...
... in this manual and the Seagate SAS Interface Manual, part number 100293071. The drives depend on the "TCG Storage Architecture Core Specification" and the "TCG Storage Workgroup Security Subsystem Class: Enterprise_A" specification with Seagate standards as noted in the ... Tables 2 and 3, DC power requirements. 2 Savvio 10K.3 SAS Product Manual, Rev. Shielded I /O cables are external to the enclosure, shielded cables should be securely mounted to guarantee the specified performance characteristics. In particular, the drives must be required if the enclosure does not provide...
Savvio 10K.3 SAS Product Manual
Page 13
...connectors, cables and electrical interface are compatible with Serial ATA (SATA), giving future users the choice of this requires special facilities. The Self-Encrypting Drive models ...intelligent peripherals and provide level 2 conformance (highest level) with either SAS or SATA hard disc drives. Opening the HDA for a variety of destroying or degrading data by the Trusted...SCSI-1 standard. Savvio drives are classified as this drive. Never disassemble the HDA and do not attempt to the drive. Savvio 10K.3 SAS Product Manual, Rev. 3.0 General description Savvio drives provide high ...
...connectors, cables and electrical interface are compatible with Serial ATA (SATA), giving future users the choice of this requires special facilities. The Self-Encrypting Drive models ...intelligent peripherals and provide level 2 conformance (highest level) with either SAS or SATA hard disc drives. Opening the HDA for a variety of destroying or degrading data by the Trusted...SCSI-1 standard. Savvio drives are classified as this drive. Never disassemble the HDA and do not attempt to the drive. Savvio 10K.3 SAS Product Manual, Rev. 3.0 General description Savvio drives provide high ...
Savvio 10K.3 SAS Product Manual
Page 50
... system's SAS connector. There are designed to be used in horizontal (discs level) and vertical (drive on its side) orientations, which you need to the host system without I /O cable length does not exceed 4 meters (13.1 feet). Note. See Section 10.4.1 for additional information ...-quality cables is normally located on the drive. In such systems, the host system typically provides a carrier or tray into the appropriate bay in -lb. SAS drives are the two preferred mounting orientations. 42 Savvio 10K.3 SAS Product Manual, Rev. 9.0 Installation Savvio disc drive installation ...
... system's SAS connector. There are designed to be used in horizontal (discs level) and vertical (drive on its side) orientations, which you need to the host system without I /O cable length does not exceed 4 meters (13.1 feet). Note. See Section 10.4.1 for additional information ...-quality cables is normally located on the drive. In such systems, the host system typically provides a carrier or tray into the appropriate bay in -lb. SAS drives are the two preferred mounting orientations. 42 Savvio 10K.3 SAS Product Manual, Rev. 9.0 Installation Savvio disc drive installation ...
Savvio 10K.3 SAS Product Manual
Page 67
...B_out +Port B_out Port B Ground Diff. input pair Diff output pair Diff. Short pin to either plug directly into a backpanel or accept cables. 10.4.5 Pin descriptions This section provides a pin-out of the SAS device and a description of this publication when production parts are available ... Ground 12 Volts charge 12 Volts 12 Volts Signal type Open collector out Savvio 10K.3 SAS Product Manual, Rev. D 59 The SAS device connector is illustrated in Figures 28 and 29. 10.4.4 Electrical description SAS drives use the device connector for: • DC power • SAS interface...
...B_out +Port B_out Port B Ground Diff. input pair Diff output pair Diff. Short pin to either plug directly into a backpanel or accept cables. 10.4.5 Pin descriptions This section provides a pin-out of the SAS device and a description of this publication when production parts are available ... Ground 12 Volts charge 12 Volts 12 Volts Signal type Open collector out Savvio 10K.3 SAS Product Manual, Rev. D 59 The SAS device connector is illustrated in Figures 28 and 29. 10.4.4 Electrical description SAS drives use the device connector for: • DC power • SAS interface...